Heart disease or cardiopathy is an umbrella term for a variety for different diseases affecting the heart. As of 2007, it is the leading cause of death in the United States, England, Canada and Wales, killing one person every 34 seconds in the United States alone.


Coronary artery disease is a disease of the artery caused by the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium. Angina pectoris (chest pain) and myocardial infarction (heart attack) are symptoms of and conditions caused by coronary heart disease.
Over 459,000 Americans die of coronary heart disease every year. In the United Kingdom, 101,000 deaths annually are due to coronary heart diseaHeart disease is caused by the habit of smoking, excessive intake of alcohol and fat-rich food. Sometimes, genetic reasons also cause the heart disease. Another survey says that, male are affected more because of the disease than woman. Clogging of arteries takes place when the blood becomes impure (due to smoking or drinking) or when excess fat mixes in the blood (fat rich food like pizzas and burger). Arteries, as you already know carry pure blood and hindrance in that means a fatal problem. Heart bypass is the best solution for this problem. In this technique, the clogged part is by-passed by some means.






http://healthnsafety.freeblog.co.nz/2008/12/08/heart-disease-causes-symptoms-and-treatment/
http://en.wikipedia.org/wiki/Heart_disease